St John Ambulance's National Training Officer Isobel Kearl, added: "Anything of that size can be a choking hazard so we would encourage parents to cut up their child’s food into small (lengthwise) pieces and be vigilant at all times especially when children are eating.

“Knowing basic first aid can have an incredible impact.

"Armed with this knowledge parents will gain the confidence to take action quickly, and ensure that they are able to act if their child starts to choke.”

Cadbury has been approached for comment.

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